8. Income Taxes (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Impact of Tax Cuts and Jobs Act of 2017 - Change in tax rate	$ (13)	$ 0
Impact of Tax Cuts and Jobs Act of 2017 - Transition Tax	116	$ 0
Impact of Tax Cuts and Jobs Act of 2017	103
Federal Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry-forwards	1,018
Deferred tax asset net operating loss carry-forwards	$ 287
NOL expiration date	Dec. 31, 2033
Foreign County [Member] | TOR Minerals Malaysia [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry-forwards	$ 3,502
Deferred tax asset net operating loss carry-forwards	2,183
Other Deferred tax asset net operating loss carry-forwards	$ 1,356